Yes, there are two in service, San Juan and Santa Cruz. They were built for the Argentine Navy and are among the fastests diesel electric subs in the world. There were plans to add a nuclear reactor to one of them but the idea was cancelled. You sure know your subs Gantu!

There are OLD pilots and there are BOLD pilots but there are very few OLD BOLD pilots. MAG

Flight III 688i Walter, Flight II was the VLS afterthought boats and the topside pattern for the VLS tubes were different on most of them. That and the grating on the stbd side by the towed array fairing also gives it away, that isn't on flight II boats.

Tim

When surfaced, the bridge access hatch can be optionally open or shut, however, when submerged it is required to be shut. (Really a no s***t precaution from a procedure in use in the sub fleet today.)
SC #3116